Body Fat Calculator

How to Use the Body Fat Calculator

• Select your gender and preferred unit system.
• Enter height, weight, neck, waist, and hip measurement if you are using the female formula.
• Click calculate to estimate body fat percentage, fat mass, lean mass, and your general category.
• Use repeated checks with the same measuring method and timing for more meaningful fitness tracking.

What Is Body Fat Percentage?

Body fat percentage estimates how much of your total body weight comes from fat tissue. Unlike BMI, it aims to say more about body composition rather than just weight relative to height.

Body fat vs BMI

BMI is a quick screening tool based on height and weight, but it cannot distinguish fat from muscle. Body fat percentage can provide a more useful picture for fitness tracking and body composition, though it is still an estimate.

U.S. Navy method explained

The U.S. Navy method uses circumference measurements such as waist, neck, height, and hip for females to estimate body fat percentage. It is practical for at-home use because it requires only a tape measure and consistent technique.

Healthy body fat ranges

Healthy ranges differ by sex, age, and training background. Athletes often carry lower body fat levels, while average and obesity ranges are typically higher. This tool uses common adult fitness category ranges to give context.

Fitness tracking tips

Measure at the same time of day, use the same tape position, and compare trends over weeks rather than reacting to one result. Sleep, hydration, training, and food choices all affect body composition progress.

Frequently Asked Questions

Related Tools